Dear Paessler experts,

is it possible to define the listening port range as I m running a ticket system on the same server which needs incoming imap.

Thx a lot

Article Comments

Hi there,

Please note that we not recommend to run PRTG on a server where another server systems runs. However, please let us know what exactly you mean with the "Listening port range"? Blocks PRTG the IMAP port and therefore the ticket system does not work? If so, please note that PRTG should only block the ports which its needs and not simply a range. For example, the IMAP port will be used if you added a IMAP Sensor to the corresponding Probe.


Mar, 2021 - Permalink

Hello Moritz,

thanks a lot for your reply. That s actually my problem. I don't use an IMAP sensor at all. But as long as the PRTG services are active my ticket system doesn't receive any incoming emails. Whenever I disable them it works.


Mar, 2021 - Permalink

Hi there,

In this case, PRTG should not bind port 143 (IMAP) or port 993 (IMAPS). Did you checked via cmd and "netstat -ano" which process binds the port? You can then check via "tasklist | find "CertainProcessID"" which certain process binds the socket.


Mar, 2021 - Permalink